Spitfire Wheels Formula Four Conical Yellow (53mm/99d)

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Spitfire Wheels Formula Four Conical Yellow (53mm/99d)

Dial in your setup with the Formula Four Conical Yellow (53mm/99d)—a fast, durable wheel that’s at home from Grant Park to late-night curb sessions around the San Gabriel Valley. The medium-width Conical profile features cutaway sidewalls to help you lock-in on grinds and release cleanly, with a smooth riding surface for confident powerslides and controlled reverts. Spitfire’s legendary Formula Four urethane delivers the sweet spot of high rebound speed, long-lasting flat-spot resistance, and balanced grip & slide you can trust on LA sidewalks and Claremont park concrete alike.

Built in the spirit of San Francisco’s DLXSF family, Spitfire has been refining urethane since the late ‘80s—its Bighead icon a staple from plaza tech to deep-end coping. The Conical shape offers a touch more contact patch and a more aggressive lock-in feel than Spitfire’s Classic, while staying quicker edge-to-edge than the Conical Full for responsive street control—ideal for quick set-ups in Monrovia alleys or hillside lines above South Pas. 

Specs

• Diameter: 53mm

• Durometer: 99d (99a) Formula Four performance urethane

• Shape: Conical (cutaway sidewalls / smooth riding surface)

• Surface: Smooth; optimized for speed, slide control, and flat-spot resistance

Stix SGV has proudly served the San Gabriel Valley skateboarding community since the late ‘90s. With three locations across Los Angeles County, we’ve been deeply rooted in the local scene. Our Monrovia shop has been a staple since 1997, followed by our Claremont location in 2014, and our South Pasadena shop opening its doors in 2022. Our mission has always been simple: to uphold skateboarding culture and stay true to our community.